/*
 * Copyright 2016-2018 shardingsphere.io.
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * </p>
 */

package io.shardingsphere.core.merger.event;

import com.google.common.base.Optional;

/**
 * Result set merge event.
 * 
 * @author chenqingyang
 */
public class ResultSetMergeEvent extends AbstractMergeEvent {
    
    
    /**
     * Get exception.
     *
     * @return exception
     */
    public Optional<Exception> getException() {
        Optional<? extends Exception> ex = super.getException();
        if (ex.isPresent()) {
            return Optional.of(ex.get());
        }
        return Optional.absent();
    }
}
